1/* 2 * RTSP/SDP client 3 * Copyright (c) 2002 Fabrice Bellard 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "libavutil/avassert.h" 23#include "libavutil/base64.h" 24#include "libavutil/avstring.h" 25#include "libavutil/intreadwrite.h" 26#include "libavutil/mathematics.h" 27#include "libavutil/parseutils.h" 28#include "libavutil/random_seed.h" 29#include "libavutil/dict.h" 30#include "libavutil/opt.h" 31#include "libavutil/time.h" 32#include "avformat.h" 33#include "avio_internal.h" 34 35#if HAVE_POLL_H 36#include <poll.h> 37#endif 38#include "internal.h" 39#include "network.h" 40#include "os_support.h" 41#include "http.h" 42#include "rtsp.h" 43 44#include "rtpdec.h" 45#include "rtpproto.h" 46#include "rdt.h" 47#include "rtpdec_formats.h" 48#include "rtpenc_chain.h" 49#include "url.h" 50#include "rtpenc.h" 51#include "mpegts.h" 52 53/* Timeout values for socket poll, in ms, 54 * and read_packet(), in seconds */ 55#define POLL_TIMEOUT_MS 100 56#define READ_PACKET_TIMEOUT_S 10 57#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS 58#define SDP_MAX_SIZE 16384 59#define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH 60#define DEFAULT_REORDERING_DELAY 100000 61 62#define OFFSET(x) offsetof(RTSPState, x) 63#define DEC AV_OPT_FLAG_DECODING_PARAM 64#define ENC AV_OPT_FLAG_ENCODING_PARAM 65 66#define RTSP_FLAG_OPTS(name, longname) \ 67 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \ 68 { "filter_src", "only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" } 69 70#define RTSP_MEDIATYPE_OPTS(name, longname) \ 71 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \ 72 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \ 73 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \ 74 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" } 75 76#define RTSP_REORDERING_OPTS() \ 77 { "reorder_queue_size", "set number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC } 78 79const AVOption ff_rtsp_options[] = { 80 { "initial_pause", "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC }, 81 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags), 82 { "rtsp_transport", "set RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \ 83 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \ 84 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \ 85 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" }, 86 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" }, 87 RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"), 88 { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" }, 89 { "prefer_tcp", "try RTP via TCP first, if available", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_PREFER_TCP}, 0, 0, DEC|ENC, "rtsp_flags" }, 90 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"), 91 { "min_port", "set minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC }, 92 { "max_port", "set maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC }, 93 { "timeout", "set maximum timeout (in seconds) to wait for incoming connections (-1 is infinite, imply flag listen)", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC }, 94 { "stimeout", "set timeout (in microseconds) of socket TCP I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC }, 95 RTSP_REORDERING_OPTS(), 96 { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC }, 97 { NULL }, 98}; 99 100static const AVOption sdp_options[] = { 101 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"), 102 { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" }, 103 { "rtcp_to_source", "send RTCP packets to the source address of received packets", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_RTCP_TO_SOURCE}, 0, 0, DEC, "rtsp_flags" }, 104 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"), 105 RTSP_REORDERING_OPTS(), 106 { NULL }, 107}; 108 109static const AVOption rtp_options[] = { 110 RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"), 111 RTSP_REORDERING_OPTS(), 112 { NULL }, 113}; 114 115static void get_word_until_chars(char *buf, int buf_size, 116 const char *sep, const char **pp) 117{ 118 const char *p; 119 char *q; 120 121 p = *pp; 122 p += strspn(p, SPACE_CHARS); 123 q = buf; 124 while (!strchr(sep, *p) && *p != '\0') { 125 if ((q - buf) < buf_size - 1) 126 *q++ = *p; 127 p++; 128 } 129 if (buf_size > 0) 130 *q = '\0'; 131 *pp = p; 132} 133 134static void get_word_sep(char *buf, int buf_size, const char *sep, 135 const char **pp) 136{ 137 if (**pp == '/') (*pp)++; 138 get_word_until_chars(buf, buf_size, sep, pp); 139} 140 141static void get_word(char *buf, int buf_size, const char **pp) 142{ 143 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp); 144} 145 146/** Parse a string p in the form of Range:npt=xx-xx, and determine the start 147 * and end time. 148 * Used for seeking in the rtp stream. 149 */ 150static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end) 151{ 152 char buf[256]; 153 154 p += strspn(p, SPACE_CHARS); 155 if (!av_stristart(p, "npt=", &p)) 156 return; 157 158 *start = AV_NOPTS_VALUE; 159 *end = AV_NOPTS_VALUE; 160 161 get_word_sep(buf, sizeof(buf), "-", &p); 162 av_parse_time(start, buf, 1); 163 if (*p == '-') { 164 p++; 165 get_word_sep(buf, sizeof(buf), "-", &p); 166 av_parse_time(end, buf, 1); 167 } 168} 169 170static int get_sockaddr(const char *buf, struct sockaddr_storage *sock) 171{ 172 struct addrinfo hints = { 0 }, *ai = NULL; 173 hints.ai_flags = AI_NUMERICHOST; 174 if (getaddrinfo(buf, NULL, &hints, &ai)) 175 return -1; 176 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen)); 177 freeaddrinfo(ai); 178 return 0; 179} 180 181#if CONFIG_RTPDEC 182static void init_rtp_handler(RTPDynamicProtocolHandler *handler, 183 RTSPStream *rtsp_st, AVCodecContext *codec) 184{ 185 if (!handler) 186 return; 187 if (codec) 188 codec->codec_id = handler->codec_id; 189 rtsp_st->dynamic_handler = handler; 190 if (handler->alloc) { 191 rtsp_st->dynamic_protocol_context = handler->alloc(); 192 if (!rtsp_st->dynamic_protocol_context) 193 rtsp_st->dynamic_handler = NULL; 194 } 195} 196 197/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */ 198static int sdp_parse_rtpmap(AVFormatContext *s, 199 AVStream *st, RTSPStream *rtsp_st, 200 int payload_type, const char *p) 201{ 202 AVCodecContext *codec = st->codec; 203 char buf[256]; 204 int i; 205 AVCodec *c; 206 const char *c_name; 207 208 /* See if we can handle this kind of payload. 209 * The space should normally not be there but some Real streams or 210 * particular servers ("RealServer Version 6.1.3.970", see issue 1658) 211 * have a trailing space. */ 212 get_word_sep(buf, sizeof(buf), "/ ", &p); 213 if (payload_type < RTP_PT_PRIVATE) { 214 /* We are in a standard case 215 * (from http://www.iana.org/assignments/rtp-parameters). */ 216 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type); 217 } 218 219 if (codec->codec_id == AV_CODEC_ID_NONE) { 220 RTPDynamicProtocolHandler *handler = 221 ff_rtp_handler_find_by_name(buf, codec->codec_type); 222 init_rtp_handler(handler, rtsp_st, codec); 223 /* If no dynamic handler was found, check with the list of standard 224 * allocated types, if such a stream for some reason happens to 225 * use a private payload type. This isn't handled in rtpdec.c, since 226 * the format name from the rtpmap line never is passed into rtpdec. */ 227 if (!rtsp_st->dynamic_handler) 228 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type); 229 } 230 231 c = avcodec_find_decoder(codec->codec_id); 232 if (c && c->name) 233 c_name = c->name; 234 else 235 c_name = "(null)"; 236 237 get_word_sep(buf, sizeof(buf), "/", &p); 238 i = atoi(buf); 239 switch (codec->codec_type) { 240 case AVMEDIA_TYPE_AUDIO: 241 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name); 242 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE; 243 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS; 244 if (i > 0) { 245 codec->sample_rate = i; 246 avpriv_set_pts_info(st, 32, 1, codec->sample_rate); 247 get_word_sep(buf, sizeof(buf), "/", &p); 248 i = atoi(buf); 249 if (i > 0) 250 codec->channels = i; 251 } 252 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n", 253 codec->sample_rate); 254 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n", 255 codec->channels); 256 break; 257 case AVMEDIA_TYPE_VIDEO: 258 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name); 259 if (i > 0) 260 avpriv_set_pts_info(st, 32, 1, i); 261 break; 262 default: 263 break; 264 } 265 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) 266 rtsp_st->dynamic_handler->init(s, st->index, 267 rtsp_st->dynamic_protocol_context); 268 return 0; 269} 270 271/* parse the attribute line from the fmtp a line of an sdp response. This 272 * is broken out as a function because it is used in rtp_h264.c, which is 273 * forthcoming. */ 274int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, 275 char *value, int value_size) 276{ 277 *p += strspn(*p, SPACE_CHARS); 278 if (**p) { 279 get_word_sep(attr, attr_size, "=", p); 280 if (**p == '=') 281 (*p)++; 282 get_word_sep(value, value_size, ";", p); 283 if (**p == ';') 284 (*p)++; 285 return 1; 286 } 287 return 0; 288} 289 290typedef struct SDPParseState { 291 /* SDP only */ 292 struct sockaddr_storage default_ip; 293 int default_ttl; 294 int skip_media; ///< set if an unknown m= line occurs 295 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */ 296 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */ 297 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */ 298 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */ 299 int seen_rtpmap; 300 int seen_fmtp; 301 char delayed_fmtp[2048]; 302} SDPParseState; 303 304static void copy_default_source_addrs(struct RTSPSource **addrs, int count, 305 struct RTSPSource ***dest, int *dest_count) 306{ 307 RTSPSource *rtsp_src, *rtsp_src2; 308 int i; 309 for (i = 0; i < count; i++) { 310 rtsp_src = addrs[i]; 311 rtsp_src2 = av_malloc(sizeof(*rtsp_src2)); 312 if (!rtsp_src2) 313 continue; 314 memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src)); 315 dynarray_add(dest, dest_count, rtsp_src2); 316 } 317} 318 319static void parse_fmtp(AVFormatContext *s, RTSPState *rt, 320 int payload_type, const char *line) 321{ 322 int i; 323 324 for (i = 0; i < rt->nb_rtsp_streams; i++) { 325 RTSPStream *rtsp_st = rt->rtsp_streams[i]; 326 if (rtsp_st->sdp_payload_type == payload_type && 327 rtsp_st->dynamic_handler && 328 rtsp_st->dynamic_handler->parse_sdp_a_line) { 329 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, 330 rtsp_st->dynamic_protocol_context, line); 331 } 332 } 333} 334 335static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1, 336 int letter, const char *buf) 337{ 338 RTSPState *rt = s->priv_data; 339 char buf1[64], st_type[64]; 340 const char *p; 341 enum AVMediaType codec_type; 342 int payload_type; 343 AVStream *st; 344 RTSPStream *rtsp_st; 345 RTSPSource *rtsp_src; 346 struct sockaddr_storage sdp_ip; 347 int ttl; 348 349 av_dlog(s, "sdp: %c='%s'\n", letter, buf); 350 351 p = buf; 352 if (s1->skip_media && letter != 'm') 353 return; 354 switch (letter) { 355 case 'c': 356 get_word(buf1, sizeof(buf1), &p); 357 if (strcmp(buf1, "IN") != 0) 358 return; 359 get_word(buf1, sizeof(buf1), &p); 360 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6")) 361 return; 362 get_word_sep(buf1, sizeof(buf1), "/", &p); 363 if (get_sockaddr(buf1, &sdp_ip)) 364 return; 365 ttl = 16; 366 if (*p == '/') { 367 p++; 368 get_word_sep(buf1, sizeof(buf1), "/", &p); 369 ttl = atoi(buf1); 370 } 371 if (s->nb_streams == 0) { 372 s1->default_ip = sdp_ip; 373 s1->default_ttl = ttl; 374 } else { 375 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1]; 376 rtsp_st->sdp_ip = sdp_ip; 377 rtsp_st->sdp_ttl = ttl; 378 } 379 break; 380 case 's': 381 av_dict_set(&s->metadata, "title", p, 0); 382 break; 383 case 'i': 384 if (s->nb_streams == 0) { 385 av_dict_set(&s->metadata, "comment", p, 0); 386 break; 387 } 388 break; 389 case 'm': 390 /* new stream */ 391 s1->skip_media = 0; 392 s1->seen_fmtp = 0; 393 s1->seen_rtpmap = 0; 394 codec_type = AVMEDIA_TYPE_UNKNOWN; 395 get_word(st_type, sizeof(st_type), &p); 396 if (!strcmp(st_type, "audio")) { 397 codec_type = AVMEDIA_TYPE_AUDIO; 398 } else if (!strcmp(st_type, "video")) { 399 codec_type = AVMEDIA_TYPE_VIDEO; 400 } else if (!strcmp(st_type, "application")) { 401 codec_type = AVMEDIA_TYPE_DATA; 402 } 403 if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) { 404 s1->skip_media = 1; 405 return; 406 } 407 rtsp_st = av_mallocz(sizeof(RTSPStream)); 408 if (!rtsp_st) 409 return; 410 rtsp_st->stream_index = -1; 411 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st); 412 413 rtsp_st->sdp_ip = s1->default_ip; 414 rtsp_st->sdp_ttl = s1->default_ttl; 415 416 copy_default_source_addrs(s1->default_include_source_addrs, 417 s1->nb_default_include_source_addrs, 418 &rtsp_st->include_source_addrs, 419 &rtsp_st->nb_include_source_addrs); 420 copy_default_source_addrs(s1->default_exclude_source_addrs, 421 s1->nb_default_exclude_source_addrs, 422 &rtsp_st->exclude_source_addrs, 423 &rtsp_st->nb_exclude_source_addrs); 424 425 get_word(buf1, sizeof(buf1), &p); /* port */ 426 rtsp_st->sdp_port = atoi(buf1); 427 428 get_word(buf1, sizeof(buf1), &p); /* protocol */ 429 if (!strcmp(buf1, "udp")) 430 rt->transport = RTSP_TRANSPORT_RAW; 431 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF")) 432 rtsp_st->feedback = 1; 433 434 /* XXX: handle list of formats */ 435 get_word(buf1, sizeof(buf1), &p); /* format list */ 436 rtsp_st->sdp_payload_type = atoi(buf1); 437 438 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) { 439 /* no corresponding stream */ 440 if (rt->transport == RTSP_TRANSPORT_RAW) { 441 if (!rt->ts && CONFIG_RTPDEC) 442 rt->ts = ff_mpegts_parse_open(s); 443 } else { 444 RTPDynamicProtocolHandler *handler; 445 handler = ff_rtp_handler_find_by_id( 446 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA); 447 init_rtp_handler(handler, rtsp_st, NULL); 448 if (handler && handler->init) 449 handler->init(s, -1, rtsp_st->dynamic_protocol_context); 450 } 451 } else if (rt->server_type == RTSP_SERVER_WMS && 452 codec_type == AVMEDIA_TYPE_DATA) { 453 /* RTX stream, a stream that carries all the other actual 454 * audio/video streams. Don't expose this to the callers. */ 455 } else { 456 st = avformat_new_stream(s, NULL); 457 if (!st) 458 return; 459 st->id = rt->nb_rtsp_streams - 1; 460 rtsp_st->stream_index = st->index; 461 st->codec->codec_type = codec_type; 462 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) { 463 RTPDynamicProtocolHandler *handler; 464 /* if standard payload type, we can find the codec right now */ 465 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type); 466 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && 467 st->codec->sample_rate > 0) 468 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate); 469 /* Even static payload types may need a custom depacketizer */ 470 handler = ff_rtp_handler_find_by_id( 471 rtsp_st->sdp_payload_type, st->codec->codec_type); 472 init_rtp_handler(handler, rtsp_st, st->codec); 473 if (handler && handler->init) 474 handler->init(s, st->index, 475 rtsp_st->dynamic_protocol_context); 476 } 477 } 478 /* put a default control url */ 479 av_strlcpy(rtsp_st->control_url, rt->control_uri, 480 sizeof(rtsp_st->control_url)); 481 break; 482 case 'a': 483 if (av_strstart(p, "control:", &p)) { 484 if (s->nb_streams == 0) { 485 if (!strncmp(p, "rtsp://", 7)) 486 av_strlcpy(rt->control_uri, p, 487 sizeof(rt->control_uri)); 488 } else { 489 char proto[32]; 490 /* get the control url */ 491 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1]; 492 493 /* XXX: may need to add full url resolution */ 494 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0, 495 NULL, NULL, 0, p); 496 if (proto[0] == '\0') { 497 /* relative control URL */ 498 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/') 499 av_strlcat(rtsp_st->control_url, "/", 500 sizeof(rtsp_st->control_url)); 501 av_strlcat(rtsp_st->control_url, p, 502 sizeof(rtsp_st->control_url)); 503 } else 504 av_strlcpy(rtsp_st->control_url, p, 505 sizeof(rtsp_st->control_url)); 506 } 507 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) { 508 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */ 509 get_word(buf1, sizeof(buf1), &p); 510 payload_type = atoi(buf1); 511 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1]; 512 if (rtsp_st->stream_index >= 0) { 513 st = s->streams[rtsp_st->stream_index]; 514 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p); 515 } 516 s1->seen_rtpmap = 1; 517 if (s1->seen_fmtp) { 518 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp); 519 } 520 } else if (av_strstart(p, "fmtp:", &p) || 521 av_strstart(p, "framesize:", &p)) { 522 // let dynamic protocol handlers have a stab at the line. 523 get_word(buf1, sizeof(buf1), &p); 524 payload_type = atoi(buf1); 525 if (s1->seen_rtpmap) { 526 parse_fmtp(s, rt, payload_type, buf); 527 } else { 528 s1->seen_fmtp = 1; 529 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp)); 530 } 531 } else if (av_strstart(p, "range:", &p)) { 532 int64_t start, end; 533 534 // this is so that seeking on a streamed file can work. 535 rtsp_parse_range_npt(p, &start, &end); 536 s->start_time = start; 537 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */ 538 s->duration = (end == AV_NOPTS_VALUE) ? 539 AV_NOPTS_VALUE : end - start; 540 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) { 541 if (atoi(p) == 1) 542 rt->transport = RTSP_TRANSPORT_RDT; 543 } else if (av_strstart(p, "SampleRate:integer;", &p) && 544 s->nb_streams > 0) { 545 st = s->streams[s->nb_streams - 1]; 546 st->codec->sample_rate = atoi(p); 547 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) { 548 // RFC 4568 549 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1]; 550 get_word(buf1, sizeof(buf1), &p); // ignore tag 551 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p); 552 p += strspn(p, SPACE_CHARS); 553 if (av_strstart(p, "inline:", &p)) 554 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p); 555 } else if (av_strstart(p, "source-filter:", &p)) { 556 int exclude = 0; 557 get_word(buf1, sizeof(buf1), &p); 558 if (strcmp(buf1, "incl") && strcmp(buf1, "excl")) 559 return; 560 exclude = !strcmp(buf1, "excl"); 561 562 get_word(buf1, sizeof(buf1), &p); 563 if (strcmp(buf1, "IN") != 0) 564 return; 565 get_word(buf1, sizeof(buf1), &p); 566 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*")) 567 return; 568 // not checking that the destination address actually matches or is wildcard 569 get_word(buf1, sizeof(buf1), &p); 570 571 while (*p != '\0') { 572 rtsp_src = av_mallocz(sizeof(*rtsp_src)); 573 if (!rtsp_src) 574 return; 575 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p); 576 if (exclude) { 577 if (s->nb_streams == 0) { 578 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src); 579 } else { 580 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1]; 581 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src); 582 } 583 } else { 584 if (s->nb_streams == 0) { 585 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src); 586 } else { 587 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1]; 588 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src); 589 } 590 } 591 } 592 } else { 593 if (rt->server_type == RTSP_SERVER_WMS) 594 ff_wms_parse_sdp_a_line(s, p); 595 if (s->nb_streams > 0) { 596 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1]; 597 598 if (rt->server_type == RTSP_SERVER_REAL) 599 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p); 600 601 if (rtsp_st->dynamic_handler && 602 rtsp_st->dynamic_handler->parse_sdp_a_line) 603 rtsp_st->dynamic_handler->parse_sdp_a_line(s, 604 rtsp_st->stream_index, 605 rtsp_st->dynamic_protocol_context, buf); 606 } 607 } 608 break; 609 } 610} 611 612int ff_sdp_parse(AVFormatContext *s, const char *content) 613{ 614 RTSPState *rt = s->priv_data; 615 const char *p; 616 int letter, i; 617 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams, 618 * contain long SDP lines containing complete ASF Headers (several 619 * kB) or arrays of MDPR (RM stream descriptor) headers plus 620 * "rulebooks" describing their properties. Therefore, the SDP line 621 * buffer is large. 622 * 623 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line 624 * in rtpdec_xiph.c. */ 625 char buf[16384], *q; 626 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state; 627 628 p = content; 629 for (;;) { 630 p += strspn(p, SPACE_CHARS); 631 letter = *p; 632 if (letter == '\0') 633 break; 634 p++; 635 if (*p != '=') 636 goto next_line; 637 p++; 638 /* get the content */ 639 q = buf; 640 while (*p != '\n' && *p != '\r' && *p != '\0') { 641 if ((q - buf) < sizeof(buf) - 1) 642 *q++ = *p; 643 p++; 644 } 645 *q = '\0'; 646 sdp_parse_line(s, s1, letter, buf); 647 next_line: 648 while (*p != '\n' && *p != '\0') 649 p++; 650 if (*p == '\n') 651 p++; 652 } 653 654 for (i = 0; i < s1->nb_default_include_source_addrs; i++) 655 av_free(s1->default_include_source_addrs[i]); 656 av_freep(&s1->default_include_source_addrs); 657 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++) 658 av_free(s1->default_exclude_source_addrs[i]); 659 av_freep(&s1->default_exclude_source_addrs); 660 661 rt->p = av_malloc_array(rt->nb_rtsp_streams + 1, sizeof(struct pollfd) * 2); 662 if (!rt->p) return AVERROR(ENOMEM); 663 return 0; 664} 665#endif /* CONFIG_RTPDEC */ 666 667void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets) 668{ 669 RTSPState *rt = s->priv_data; 670 int i; 671 672 for (i = 0; i < rt->nb_rtsp_streams; i++) { 673 RTSPStream *rtsp_st = rt->rtsp_streams[i]; 674 if (!rtsp_st) 675 continue; 676 if (rtsp_st->transport_priv) { 677 if (s->oformat) { 678 AVFormatContext *rtpctx = rtsp_st->transport_priv; 679 av_write_trailer(rtpctx); 680 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) { 681 uint8_t *ptr; 682 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets) 683 ff_rtsp_tcp_write_packet(s, rtsp_st); 684 avio_close_dyn_buf(rtpctx->pb, &ptr); 685 av_free(ptr); 686 } else { 687 avio_close(rtpctx->pb); 688 } 689 avformat_free_context(rtpctx); 690 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) 691 ff_rdt_parse_close(rtsp_st->transport_priv); 692 else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC) 693 ff_rtp_parse_close(rtsp_st->transport_priv); 694 } 695 rtsp_st->transport_priv = NULL; 696 if (rtsp_st->rtp_handle) 697 ffurl_close(rtsp_st->rtp_handle); 698 rtsp_st->rtp_handle = NULL; 699 } 700} 701 702/* close and free RTSP streams */ 703void ff_rtsp_close_streams(AVFormatContext *s) 704{ 705 RTSPState *rt = s->priv_data; 706 int i, j; 707 RTSPStream *rtsp_st; 708 709 ff_rtsp_undo_setup(s, 0); 710 for (i = 0; i < rt->nb_rtsp_streams; i++) { 711 rtsp_st = rt->rtsp_streams[i]; 712 if (rtsp_st) { 713 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) 714 rtsp_st->dynamic_handler->free( 715 rtsp_st->dynamic_protocol_context); 716 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++) 717 av_free(rtsp_st->include_source_addrs[j]); 718 av_freep(&rtsp_st->include_source_addrs); 719 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++) 720 av_free(rtsp_st->exclude_source_addrs[j]); 721 av_freep(&rtsp_st->exclude_source_addrs); 722 723 av_free(rtsp_st); 724 } 725 } 726 av_free(rt->rtsp_streams); 727 if (rt->asf_ctx) { 728 avformat_close_input(&rt->asf_ctx); 729 } 730 if (rt->ts && CONFIG_RTPDEC) 731 ff_mpegts_parse_close(rt->ts); 732 av_free(rt->p); 733 av_free(rt->recvbuf); 734} 735 736int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st) 737{ 738 RTSPState *rt = s->priv_data; 739 AVStream *st = NULL; 740 int reordering_queue_size = rt->reordering_queue_size; 741 if (reordering_queue_size < 0) { 742 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay) 743 reordering_queue_size = 0; 744 else 745 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE; 746 } 747 748 /* open the RTP context */ 749 if (rtsp_st->stream_index >= 0) 750 st = s->streams[rtsp_st->stream_index]; 751 if (!st) 752 s->ctx_flags |= AVFMTCTX_NOHEADER; 753 754 if (s->oformat && CONFIG_RTSP_MUXER) { 755 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv, 756 s, st, rtsp_st->rtp_handle, 757 RTSP_TCP_MAX_PACKET_SIZE, 758 rtsp_st->stream_index); 759 /* Ownership of rtp_handle is passed to the rtp mux context */ 760 rtsp_st->rtp_handle = NULL; 761 if (ret < 0) 762 return ret; 763 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base; 764 } else if (rt->transport == RTSP_TRANSPORT_RAW) { 765 return 0; // Don't need to open any parser here 766 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) 767 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index, 768 rtsp_st->dynamic_protocol_context, 769 rtsp_st->dynamic_handler); 770 else if (CONFIG_RTPDEC) 771 rtsp_st->transport_priv = ff_rtp_parse_open(s, st, 772 rtsp_st->sdp_payload_type, 773 reordering_queue_size); 774 775 if (!rtsp_st->transport_priv) { 776 return AVERROR(ENOMEM); 777 } else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC) { 778 if (rtsp_st->dynamic_handler) { 779 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv, 780 rtsp_st->dynamic_protocol_context, 781 rtsp_st->dynamic_handler); 782 } 783 if (rtsp_st->crypto_suite[0]) 784 ff_rtp_parse_set_crypto(rtsp_st->transport_priv, 785 rtsp_st->crypto_suite, 786 rtsp_st->crypto_params); 787 } 788 789 return 0; 790} 791 792#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER 793static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp) 794{ 795 const char *q; 796 char *p; 797 int v; 798 799 q = *pp; 800 q += strspn(q, SPACE_CHARS); 801 v = strtol(q, &p, 10); 802 if (*p == '-') { 803 p++; 804 *min_ptr = v; 805 v = strtol(p, &p, 10); 806 *max_ptr = v; 807 } else { 808 *min_ptr = v; 809 *max_ptr = v; 810 } 811 *pp = p; 812} 813 814/* XXX: only one transport specification is parsed */ 815static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p) 816{ 817 char transport_protocol[16]; 818 char profile[16]; 819 char lower_transport[16]; 820 char parameter[16]; 821 RTSPTransportField *th; 822 char buf[256]; 823 824 reply->nb_transports = 0; 825 826 for (;;) { 827 p += strspn(p, SPACE_CHARS); 828 if (*p == '\0') 829 break; 830 831 th = &reply->transports[reply->nb_transports]; 832 833 get_word_sep(transport_protocol, sizeof(transport_protocol), 834 "/", &p); 835 if (!av_strcasecmp (transport_protocol, "rtp")) { 836 get_word_sep(profile, sizeof(profile), "/;,", &p); 837 lower_transport[0] = '\0'; 838 /* rtp/avp/<protocol> */ 839 if (*p == '/') { 840 get_word_sep(lower_transport, sizeof(lower_transport), 841 ";,", &p); 842 } 843 th->transport = RTSP_TRANSPORT_RTP; 844 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") || 845 !av_strcasecmp (transport_protocol, "x-real-rdt")) { 846 /* x-pn-tng/<protocol> */ 847 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p); 848 profile[0] = '\0'; 849 th->transport = RTSP_TRANSPORT_RDT; 850 } else if (!av_strcasecmp(transport_protocol, "raw")) { 851 get_word_sep(profile, sizeof(profile), "/;,", &p); 852 lower_transport[0] = '\0'; 853 /* raw/raw/<protocol> */ 854 if (*p == '/') { 855 get_word_sep(lower_transport, sizeof(lower_transport), 856 ";,", &p); 857 } 858 th->transport = RTSP_TRANSPORT_RAW; 859 } 860 if (!av_strcasecmp(lower_transport, "TCP")) 861 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP; 862 else 863 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP; 864 865 if (*p == ';') 866 p++; 867 /* get each parameter */ 868 while (*p != '\0' && *p != ',') { 869 get_word_sep(parameter, sizeof(parameter), "=;,", &p); 870 if (!strcmp(parameter, "port")) { 871 if (*p == '=') { 872 p++; 873 rtsp_parse_range(&th->port_min, &th->port_max, &p); 874 } 875 } else if (!strcmp(parameter, "client_port")) { 876 if (*p == '=') { 877 p++; 878 rtsp_parse_range(&th->client_port_min, 879 &th->client_port_max, &p); 880 } 881 } else if (!strcmp(parameter, "server_port")) { 882 if (*p == '=') { 883 p++; 884 rtsp_parse_range(&th->server_port_min, 885 &th->server_port_max, &p); 886 } 887 } else if (!strcmp(parameter, "interleaved")) { 888 if (*p == '=') { 889 p++; 890 rtsp_parse_range(&th->interleaved_min, 891 &th->interleaved_max, &p); 892 } 893 } else if (!strcmp(parameter, "multicast")) { 894 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP) 895 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST; 896 } else if (!strcmp(parameter, "ttl")) { 897 if (*p == '=') { 898 char *end; 899 p++; 900 th->ttl = strtol(p, &end, 10); 901 p = end; 902 } 903 } else if (!strcmp(parameter, "destination")) { 904 if (*p == '=') { 905 p++; 906 get_word_sep(buf, sizeof(buf), ";,", &p); 907 get_sockaddr(buf, &th->destination); 908 } 909 } else if (!strcmp(parameter, "source")) { 910 if (*p == '=') { 911 p++; 912 get_word_sep(buf, sizeof(buf), ";,", &p); 913 av_strlcpy(th->source, buf, sizeof(th->source)); 914 } 915 } else if (!strcmp(parameter, "mode")) { 916 if (*p == '=') { 917 p++; 918 get_word_sep(buf, sizeof(buf), ";, ", &p); 919 if (!strcmp(buf, "record") || 920 !strcmp(buf, "receive")) 921 th->mode_record = 1; 922 } 923 } 924 925 while (*p != ';' && *p != '\0' && *p != ',') 926 p++; 927 if (*p == ';') 928 p++; 929 } 930 if (*p == ',') 931 p++; 932 933 reply->nb_transports++; 934 } 935} 936 937static void handle_rtp_info(RTSPState *rt, const char *url, 938 uint32_t seq, uint32_t rtptime) 939{ 940 int i; 941 if (!rtptime || !url[0]) 942 return; 943 if (rt->transport != RTSP_TRANSPORT_RTP) 944 return; 945 for (i = 0; i < rt->nb_rtsp_streams; i++) { 946 RTSPStream *rtsp_st = rt->rtsp_streams[i]; 947 RTPDemuxContext *rtpctx = rtsp_st->transport_priv; 948 if (!rtpctx) 949 continue; 950 if (!strcmp(rtsp_st->control_url, url)) { 951 rtpctx->base_timestamp = rtptime; 952 break; 953 } 954 } 955} 956 957static void rtsp_parse_rtp_info(RTSPState *rt, const char *p) 958{ 959 int read = 0; 960 char key[20], value[1024], url[1024] = ""; 961 uint32_t seq = 0, rtptime = 0; 962 963 for (;;) { 964 p += strspn(p, SPACE_CHARS); 965 if (!*p) 966 break; 967 get_word_sep(key, sizeof(key), "=", &p); 968 if (*p != '=') 969 break; 970 p++; 971 get_word_sep(value, sizeof(value), ";, ", &p); 972 read++; 973 if (!strcmp(key, "url")) 974 av_strlcpy(url, value, sizeof(url)); 975 else if (!strcmp(key, "seq")) 976 seq = strtoul(value, NULL, 10); 977 else if (!strcmp(key, "rtptime")) 978 rtptime = strtoul(value, NULL, 10); 979 if (*p == ',') { 980 handle_rtp_info(rt, url, seq, rtptime); 981 url[0] = '\0'; 982 seq = rtptime = 0; 983 read = 0; 984 } 985 if (*p) 986 p++; 987 } 988 if (read > 0) 989 handle_rtp_info(rt, url, seq, rtptime); 990} 991 992void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf, 993 RTSPState *rt, const char *method) 994{ 995 const char *p; 996 997 /* NOTE: we do case independent match for broken servers */ 998 p = buf; 999 if (av_stristart(p, "Session:", &p)) { 1000 int t; 1001 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p); 1002 if (av_stristart(p, ";timeout=", &p) && 1003 (t = strtol(p, NULL, 10)) > 0) { 1004 reply->timeout = t; 1005 } 1006 } else if (av_stristart(p, "Content-Length:", &p)) { 1007 reply->content_length = strtol(p, NULL, 10); 1008 } else if (av_stristart(p, "Transport:", &p)) { 1009 rtsp_parse_transport(reply, p); 1010 } else if (av_stristart(p, "CSeq:", &p)) { 1011 reply->seq = strtol(p, NULL, 10); 1012 } else if (av_stristart(p, "Range:", &p)) { 1013 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end); 1014 } else if (av_stristart(p, "RealChallenge1:", &p)) { 1015 p += strspn(p, SPACE_CHARS); 1016 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge)); 1017 } else if (av_stristart(p, "Server:", &p)) { 1018 p += strspn(p, SPACE_CHARS); 1019 av_strlcpy(reply->server, p, sizeof(reply->server)); 1020 } else if (av_stristart(p, "Notice:", &p) || 1021 av_stristart(p, "X-Notice:", &p)) { 1022 reply->notice = strtol(p, NULL, 10); 1023 } else if (av_stristart(p, "Location:", &p)) { 1024 p += strspn(p, SPACE_CHARS); 1025 av_strlcpy(reply->location, p , sizeof(reply->location)); 1026 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) { 1027 p += strspn(p, SPACE_CHARS); 1028 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p); 1029 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) { 1030 p += strspn(p, SPACE_CHARS); 1031 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p); 1032 } else if (av_stristart(p, "Content-Base:", &p) && rt) { 1033 p += strspn(p, SPACE_CHARS); 1034 if (method && !strcmp(method, "DESCRIBE")) 1035 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri)); 1036 } else if (av_stristart(p, "RTP-Info:", &p) && rt) { 1037 p += strspn(p, SPACE_CHARS); 1038 if (method && !strcmp(method, "PLAY")) 1039 rtsp_parse_rtp_info(rt, p); 1040 } else if (av_stristart(p, "Public:", &p) && rt) { 1041 if (strstr(p, "GET_PARAMETER") && 1042 method && !strcmp(method, "OPTIONS")) 1043 rt->get_parameter_supported = 1; 1044 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) { 1045 p += strspn(p, SPACE_CHARS); 1046 rt->accept_dynamic_rate = atoi(p); 1047 } else if (av_stristart(p, "Content-Type:", &p)) { 1048 p += strspn(p, SPACE_CHARS); 1049 av_strlcpy(reply->content_type, p, sizeof(reply->content_type)); 1050 } 1051} 1052 1053/* skip a RTP/TCP interleaved packet */ 1054void ff_rtsp_skip_packet(AVFormatContext *s) 1055{ 1056 RTSPState *rt = s->priv_data; 1057 int ret, len, len1; 1058 uint8_t buf[1024]; 1059 1060 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3); 1061 if (ret != 3) 1062 return; 1063 len = AV_RB16(buf + 1); 1064 1065 av_dlog(s, "skipping RTP packet len=%d\n", len); 1066 1067 /* skip payload */ 1068 while (len > 0) { 1069 len1 = len; 1070 if (len1 > sizeof(buf)) 1071 len1 = sizeof(buf); 1072 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1); 1073 if (ret != len1) 1074 return; 1075 len -= len1; 1076 } 1077} 1078 1079int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply, 1080 unsigned char **content_ptr, 1081 int return_on_interleaved_data, const char *method) 1082{ 1083 RTSPState *rt = s->priv_data; 1084 char buf[4096], buf1[1024], *q; 1085 unsigned char ch; 1086 const char *p; 1087 int ret, content_length, line_count = 0, request = 0; 1088 unsigned char *content = NULL; 1089 1090start: 1091 line_count = 0; 1092 request = 0; 1093 content = NULL; 1094 memset(reply, 0, sizeof(*reply)); 1095 1096 /* parse reply (XXX: use buffers) */ 1097 rt->last_reply[0] = '\0'; 1098 for (;;) { 1099 q = buf; 1100 for (;;) { 1101 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1); 1102 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch); 1103 if (ret != 1) 1104 return AVERROR_EOF; 1105 if (ch == '\n') 1106 break; 1107 if (ch == '$') { 1108 /* XXX: only parse it if first char on line ? */ 1109 if (return_on_interleaved_data) { 1110 return 1; 1111 } else 1112 ff_rtsp_skip_packet(s); 1113 } else if (ch != '\r') { 1114 if ((q - buf) < sizeof(buf) - 1) 1115 *q++ = ch; 1116 } 1117 } 1118 *q = '\0'; 1119 1120 av_dlog(s, "line='%s'\n", buf); 1121 1122 /* test if last line */ 1123 if (buf[0] == '\0') 1124 break; 1125 p = buf; 1126 if (line_count == 0) { 1127 /* get reply code */ 1128 get_word(buf1, sizeof(buf1), &p); 1129 if (!strncmp(buf1, "RTSP/", 5)) { 1130 get_word(buf1, sizeof(buf1), &p); 1131 reply->status_code = atoi(buf1); 1132 av_strlcpy(reply->reason, p, sizeof(reply->reason)); 1133 } else { 1134 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method 1135 get_word(buf1, sizeof(buf1), &p); // object 1136 request = 1; 1137 } 1138 } else { 1139 ff_rtsp_parse_line(reply, p, rt, method); 1140 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply)); 1141 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply)); 1142 } 1143 line_count++; 1144 } 1145 1146 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request) 1147 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id)); 1148 1149 content_length = reply->content_length; 1150 if (content_length > 0) { 1151 /* leave some room for a trailing '\0' (useful for simple parsing) */ 1152 content = av_malloc(content_length + 1); 1153 ffurl_read_complete(rt->rtsp_hd, content, content_length); 1154 content[content_length] = '\0'; 1155 } 1156 if (content_ptr) 1157 *content_ptr = content; 1158 else 1159 av_free(content); 1160 1161 if (request) { 1162 char buf[1024]; 1163 char base64buf[AV_BASE64_SIZE(sizeof(buf))]; 1164 const char* ptr = buf; 1165 1166 if (!strcmp(reply->reason, "OPTIONS")) { 1167 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n"); 1168 if (reply->seq) 1169 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq); 1170 if (reply->session_id[0]) 1171 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", 1172 reply->session_id); 1173 } else { 1174 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n"); 1175 } 1176 av_strlcat(buf, "\r\n", sizeof(buf)); 1177 1178 if (rt->control_transport == RTSP_MODE_TUNNEL) { 1179 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf)); 1180 ptr = base64buf; 1181 } 1182 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr)); 1183 1184 rt->last_cmd_time = av_gettime(); 1185 /* Even if the request from the server had data, it is not the data 1186 * that the caller wants or expects. The memory could also be leaked 1187 * if the actual following reply has content data. */ 1188 if (content_ptr) 1189 av_freep(content_ptr); 1190 /* If method is set, this is called from ff_rtsp_send_cmd, 1191 * where a reply to exactly this request is awaited. For 1192 * callers from within packet receiving, we just want to 1193 * return to the caller and go back to receiving packets. */ 1194 if (method) 1195 goto start; 1196 return 0; 1197 } 1198 1199 if (rt->seq != reply->seq) { 1200 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n", 1201 rt->seq, reply->seq); 1202 } 1203 1204 /* EOS */ 1205 if (reply->notice == 2101 /* End-of-Stream Reached */ || 1206 reply->notice == 2104 /* Start-of-Stream Reached */ || 1207 reply->notice == 2306 /* Continuous Feed Terminated */) { 1208 rt->state = RTSP_STATE_IDLE; 1209 } else if (reply->notice >= 4400 && reply->notice < 5500) { 1210 return AVERROR(EIO); /* data or server error */ 1211 } else if (reply->notice == 2401 /* Ticket Expired */ || 1212 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ ) 1213 return AVERROR(EPERM); 1214 1215 return 0; 1216} 1217 1218/** 1219 * Send a command to the RTSP server without waiting for the reply. 1220 * 1221 * @param s RTSP (de)muxer context 1222 * @param method the method for the request 1223 * @param url the target url for the request 1224 * @param headers extra header lines to include in the request 1225 * @param send_content if non-null, the data to send as request body content 1226 * @param send_content_length the length of the send_content data, or 0 if 1227 * send_content is null 1228 * 1229 * @return zero if success, nonzero otherwise 1230 */ 1231static int rtsp_send_cmd_with_content_async(AVFormatContext *s, 1232 const char *method, const char *url, 1233 const char *headers, 1234 const unsigned char *send_content, 1235 int send_content_length) 1236{ 1237 RTSPState *rt = s->priv_data; 1238 char buf[4096], *out_buf; 1239 char base64buf[AV_BASE64_SIZE(sizeof(buf))]; 1240 1241 /* Add in RTSP headers */ 1242 out_buf = buf; 1243 rt->seq++; 1244 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url); 1245 if (headers) 1246 av_strlcat(buf, headers, sizeof(buf)); 1247 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq); 1248 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", rt->user_agent); 1249 if (rt->session_id[0] != '\0' && (!headers || 1250 !strstr(headers, "\nIf-Match:"))) { 1251 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id); 1252 } 1253 if (rt->auth[0]) { 1254 char *str = ff_http_auth_create_response(&rt->auth_state, 1255 rt->auth, url, method); 1256 if (str) 1257 av_strlcat(buf, str, sizeof(buf)); 1258 av_free(str); 1259 } 1260 if (send_content_length > 0 && send_content) 1261 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length); 1262 av_strlcat(buf, "\r\n", sizeof(buf)); 1263 1264 /* base64 encode rtsp if tunneling */ 1265 if (rt->control_transport == RTSP_MODE_TUNNEL) { 1266 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf)); 1267 out_buf = base64buf; 1268 } 1269 1270 av_dlog(s, "Sending:\n%s--\n", buf); 1271 1272 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf)); 1273 if (send_content_length > 0 && send_content) { 1274 if (rt->control_transport == RTSP_MODE_TUNNEL) { 1275 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests " 1276 "with content data not supported\n"); 1277 return AVERROR_PATCHWELCOME; 1278 } 1279 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length); 1280 } 1281 rt->last_cmd_time = av_gettime(); 1282 1283 return 0; 1284} 1285 1286int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method, 1287 const char *url, const char *headers) 1288{ 1289 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0); 1290} 1291 1292int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url, 1293 const char *headers, RTSPMessageHeader *reply, 1294 unsigned char **content_ptr) 1295{ 1296 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply, 1297 content_ptr, NULL, 0); 1298} 1299 1300int ff_rtsp_send_cmd_with_content(AVFormatContext *s, 1301 const char *method, const char *url, 1302 const char *header, 1303 RTSPMessageHeader *reply, 1304 unsigned char **content_ptr, 1305 const unsigned char *send_content, 1306 int send_content_length) 1307{ 1308 RTSPState *rt = s->priv_data; 1309 HTTPAuthType cur_auth_type; 1310 int ret, attempts = 0; 1311 1312retry: 1313 cur_auth_type = rt->auth_state.auth_type; 1314 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header, 1315 send_content, 1316 send_content_length))) 1317 return ret; 1318 1319 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0) 1320 return ret; 1321 attempts++; 1322 1323 if (reply->status_code == 401 && 1324 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) && 1325 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) 1326 goto retry; 1327 1328 if (reply->status_code > 400){ 1329 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n", 1330 method, 1331 reply->status_code, 1332 reply->reason); 1333 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply); 1334 } 1335 1336 return 0; 1337} 1338 1339int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port, 1340 int lower_transport, const char *real_challenge) 1341{ 1342 RTSPState *rt = s->priv_data; 1343 int rtx = 0, j, i, err, interleave = 0, port_off; 1344 RTSPStream *rtsp_st; 1345 RTSPMessageHeader reply1, *reply = &reply1; 1346 char cmd[2048]; 1347 const char *trans_pref; 1348 1349 if (rt->transport == RTSP_TRANSPORT_RDT) 1350 trans_pref = "x-pn-tng"; 1351 else if (rt->transport == RTSP_TRANSPORT_RAW) 1352 trans_pref = "RAW/RAW"; 1353 else 1354 trans_pref = "RTP/AVP"; 1355 1356 /* default timeout: 1 minute */ 1357 rt->timeout = 60; 1358 1359 /* Choose a random starting offset within the first half of the 1360 * port range, to allow for a number of ports to try even if the offset 1361 * happens to be at the end of the random range. */ 1362 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2); 1363 /* even random offset */ 1364 port_off -= port_off & 0x01; 1365 1366 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) { 1367 char transport[2048]; 1368 1369 /* 1370 * WMS serves all UDP data over a single connection, the RTX, which 1371 * isn't necessarily the first in the SDP but has to be the first 1372 * to be set up, else the second/third SETUP will fail with a 461. 1373 */ 1374 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP && 1375 rt->server_type == RTSP_SERVER_WMS) { 1376 if (i == 0) { 1377 /* rtx first */ 1378 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) { 1379 int len = strlen(rt->rtsp_streams[rtx]->control_url); 1380 if (len >= 4 && 1381 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4, 1382 "/rtx")) 1383 break; 1384 } 1385 if (rtx == rt->nb_rtsp_streams) 1386 return -1; /* no RTX found */ 1387 rtsp_st = rt->rtsp_streams[rtx]; 1388 } else 1389 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1]; 1390 } else 1391 rtsp_st = rt->rtsp_streams[i]; 1392 1393 /* RTP/UDP */ 1394 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) { 1395 char buf[256]; 1396 1397 if (rt->server_type == RTSP_SERVER_WMS && i > 1) { 1398 port = reply->transports[0].client_port_min; 1399 goto have_port; 1400 } 1401 1402 /* first try in specified port range */ 1403 while (j <= rt->rtp_port_max) { 1404 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1, 1405 "?localport=%d", j); 1406 /* we will use two ports per rtp stream (rtp and rtcp) */ 1407 j += 2; 1408 if (!ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE, 1409 &s->interrupt_callback, NULL)) 1410 goto rtp_opened; 1411 } 1412 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n"); 1413 err = AVERROR(EIO); 1414 goto fail; 1415 1416 rtp_opened: 1417 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle); 1418 have_port: 1419 snprintf(transport, sizeof(transport) - 1, 1420 "%s/UDP;", trans_pref); 1421 if (rt->server_type != RTSP_SERVER_REAL) 1422 av_strlcat(transport, "unicast;", sizeof(transport)); 1423 av_strlcatf(transport, sizeof(transport), 1424 "client_port=%d", port); 1425 if (rt->transport == RTSP_TRANSPORT_RTP && 1426 !(rt->server_type == RTSP_SERVER_WMS && i > 0)) 1427 av_strlcatf(transport, sizeof(transport), "-%d", port + 1); 1428 } 1429 1430 /* RTP/TCP */ 1431 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) { 1432 /* For WMS streams, the application streams are only used for 1433 * UDP. When trying to set it up for TCP streams, the server 1434 * will return an error. Therefore, we skip those streams. */ 1435 if (rt->server_type == RTSP_SERVER_WMS && 1436 (rtsp_st->stream_index < 0 || 1437 s->streams[rtsp_st->stream_index]->codec->codec_type == 1438 AVMEDIA_TYPE_DATA)) 1439 continue; 1440 snprintf(transport, sizeof(transport) - 1, 1441 "%s/TCP;", trans_pref); 1442 if (rt->transport != RTSP_TRANSPORT_RDT) 1443 av_strlcat(transport, "unicast;", sizeof(transport)); 1444 av_strlcatf(transport, sizeof(transport), 1445 "interleaved=%d-%d", 1446 interleave, interleave + 1); 1447 interleave += 2; 1448 } 1449 1450 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) { 1451 snprintf(transport, sizeof(transport) - 1, 1452 "%s/UDP;multicast", trans_pref); 1453 } 1454 if (s->oformat) { 1455 av_strlcat(transport, ";mode=record", sizeof(transport)); 1456 } else if (rt->server_type == RTSP_SERVER_REAL || 1457 rt->server_type == RTSP_SERVER_WMS) 1458 av_strlcat(transport, ";mode=play", sizeof(transport)); 1459 snprintf(cmd, sizeof(cmd), 1460 "Transport: %s\r\n", 1461 transport); 1462 if (rt->accept_dynamic_rate) 1463 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd)); 1464 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) { 1465 char real_res[41], real_csum[9]; 1466 ff_rdt_calc_response_and_checksum(real_res, real_csum, 1467 real_challenge); 1468 av_strlcatf(cmd, sizeof(cmd), 1469 "If-Match: %s\r\n" 1470 "RealChallenge2: %s, sd=%s\r\n", 1471 rt->session_id, real_res, real_csum); 1472 } 1473 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL); 1474 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) { 1475 err = 1; 1476 goto fail; 1477 } else if (reply->status_code != RTSP_STATUS_OK || 1478 reply->nb_transports != 1) { 1479 err = AVERROR_INVALIDDATA; 1480 goto fail; 1481 } 1482 1483 /* XXX: same protocol for all streams is required */ 1484 if (i > 0) { 1485 if (reply->transports[0].lower_transport != rt->lower_transport || 1486 reply->transports[0].transport != rt->transport) { 1487 err = AVERROR_INVALIDDATA; 1488 goto fail; 1489 } 1490 } else { 1491 rt->lower_transport = reply->transports[0].lower_transport; 1492 rt->transport = reply->transports[0].transport; 1493 } 1494 1495 /* Fail if the server responded with another lower transport mode 1496 * than what we requested. */ 1497 if (reply->transports[0].lower_transport != lower_transport) { 1498 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n"); 1499 err = AVERROR_INVALIDDATA; 1500 goto fail; 1501 } 1502 1503 switch(reply->transports[0].lower_transport) { 1504 case RTSP_LOWER_TRANSPORT_TCP: 1505 rtsp_st->interleaved_min = reply->transports[0].interleaved_min; 1506 rtsp_st->interleaved_max = reply->transports[0].interleaved_max; 1507 break; 1508 1509 case RTSP_LOWER_TRANSPORT_UDP: { 1510 char url[1024], options[30] = ""; 1511 const char *peer = host; 1512 1513 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC) 1514 av_strlcpy(options, "?connect=1", sizeof(options)); 1515 /* Use source address if specified */ 1516 if (reply->transports[0].source[0]) 1517 peer = reply->transports[0].source; 1518 ff_url_join(url, sizeof(url), "rtp", NULL, peer, 1519 reply->transports[0].server_port_min, "%s", options); 1520 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && 1521 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) { 1522 err = AVERROR_INVALIDDATA; 1523 goto fail; 1524 } 1525 /* Try to initialize the connection state in a 1526 * potential NAT router by sending dummy packets. 1527 * RTP/RTCP dummy packets are used for RDT, too. 1528 */ 1529 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat && 1530 CONFIG_RTPDEC) 1531 ff_rtp_send_punch_packets(rtsp_st->rtp_handle); 1532 break; 1533 } 1534 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: { 1535 char url[1024], namebuf[50], optbuf[20] = ""; 1536 struct sockaddr_storage addr; 1537 int port, ttl; 1538 1539 if (reply->transports[0].destination.ss_family) { 1540 addr = reply->transports[0].destination; 1541 port = reply->transports[0].port_min; 1542 ttl = reply->transports[0].ttl; 1543 } else { 1544 addr = rtsp_st->sdp_ip; 1545 port = rtsp_st->sdp_port; 1546 ttl = rtsp_st->sdp_ttl; 1547 } 1548 if (ttl > 0) 1549 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl); 1550 getnameinfo((struct sockaddr*) &addr, sizeof(addr), 1551 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST); 1552 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf, 1553 port, "%s", optbuf); 1554 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE, 1555 &s->interrupt_callback, NULL) < 0) { 1556 err = AVERROR_INVALIDDATA; 1557 goto fail; 1558 } 1559 break; 1560 } 1561 } 1562 1563 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st))) 1564 goto fail; 1565 } 1566 1567 if (rt->nb_rtsp_streams && reply->timeout > 0) 1568 rt->timeout = reply->timeout; 1569 1570 if (rt->server_type == RTSP_SERVER_REAL) 1571 rt->need_subscription = 1; 1572 1573 return 0; 1574 1575fail: 1576 ff_rtsp_undo_setup(s, 0); 1577 return err; 1578} 1579 1580void ff_rtsp_close_connections(AVFormatContext *s) 1581{ 1582 RTSPState *rt = s->priv_data; 1583 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out); 1584 ffurl_close(rt->rtsp_hd); 1585 rt->rtsp_hd = rt->rtsp_hd_out = NULL; 1586} 1587 1588int ff_rtsp_connect(AVFormatContext *s) 1589{ 1590 RTSPState *rt = s->priv_data; 1591 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128]; 1592 int port, err, tcp_fd; 1593 RTSPMessageHeader reply1 = {0}, *reply = &reply1; 1594 int lower_transport_mask = 0; 1595 char real_challenge[64] = ""; 1596 struct sockaddr_storage peer; 1597 socklen_t peer_len = sizeof(peer); 1598 1599 if (rt->rtp_port_max < rt->rtp_port_min) { 1600 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less " 1601 "than min port %d\n", rt->rtp_port_max, 1602 rt->rtp_port_min); 1603 return AVERROR(EINVAL); 1604 } 1605 1606 if (!ff_network_init()) 1607 return AVERROR(EIO); 1608 1609 if (s->max_delay < 0) /* Not set by the caller */ 1610 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0; 1611 1612 rt->control_transport = RTSP_MODE_PLAIN; 1613 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) { 1614 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP; 1615 rt->control_transport = RTSP_MODE_TUNNEL; 1616 } 1617 /* Only pass through valid flags from here */ 1618 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1; 1619 1620redirect: 1621 lower_transport_mask = rt->lower_transport_mask; 1622 /* extract hostname and port */ 1623 av_url_split(NULL, 0, auth, sizeof(auth), 1624 host, sizeof(host), &port, path, sizeof(path), s->filename); 1625 if (*auth) { 1626 av_strlcpy(rt->auth, auth, sizeof(rt->auth)); 1627 } 1628 if (port < 0) 1629 port = RTSP_DEFAULT_PORT; 1630 1631 if (!lower_transport_mask) 1632 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1; 1633 1634 if (s->oformat) { 1635 /* Only UDP or TCP - UDP multicast isn't supported. */ 1636 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) | 1637 (1 << RTSP_LOWER_TRANSPORT_TCP); 1638 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) { 1639 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, " 1640 "only UDP and TCP are supported for output.\n"); 1641 err = AVERROR(EINVAL); 1642 goto fail; 1643 } 1644 } 1645 1646 /* Construct the URI used in request; this is similar to s->filename, 1647 * but with authentication credentials removed and RTSP specific options 1648 * stripped out. */ 1649 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL, 1650 host, port, "%s", path); 1651 1652 if (rt->control_transport == RTSP_MODE_TUNNEL) { 1653 /* set up initial handshake for tunneling */ 1654 char httpname[1024]; 1655 char sessioncookie[17]; 1656 char headers[1024]; 1657 1658 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path); 1659 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x", 1660 av_get_random_seed(), av_get_random_seed()); 1661 1662 /* GET requests */ 1663 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ, 1664 &s->interrupt_callback) < 0) { 1665 err = AVERROR(EIO); 1666 goto fail; 1667 } 1668 1669 /* generate GET headers */ 1670 snprintf(headers, sizeof(headers), 1671 "x-sessioncookie: %s\r\n" 1672 "Accept: application/x-rtsp-tunnelled\r\n" 1673 "Pragma: no-cache\r\n" 1674 "Cache-Control: no-cache\r\n", 1675 sessioncookie); 1676 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0); 1677 1678 /* complete the connection */ 1679 if (ffurl_connect(rt->rtsp_hd, NULL)) { 1680 err = AVERROR(EIO); 1681 goto fail; 1682 } 1683 1684 /* POST requests */ 1685 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE, 1686 &s->interrupt_callback) < 0 ) { 1687 err = AVERROR(EIO); 1688 goto fail; 1689 } 1690 1691 /* generate POST headers */ 1692 snprintf(headers, sizeof(headers), 1693 "x-sessioncookie: %s\r\n" 1694 "Content-Type: application/x-rtsp-tunnelled\r\n" 1695 "Pragma: no-cache\r\n" 1696 "Cache-Control: no-cache\r\n" 1697 "Content-Length: 32767\r\n" 1698 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n", 1699 sessioncookie); 1700 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0); 1701 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0); 1702 1703 /* Initialize the authentication state for the POST session. The HTTP 1704 * protocol implementation doesn't properly handle multi-pass 1705 * authentication for POST requests, since it would require one of 1706 * the following: 1707 * - implementing Expect: 100-continue, which many HTTP servers 1708 * don't support anyway, even less the RTSP servers that do HTTP 1709 * tunneling 1710 * - sending the whole POST data until getting a 401 reply specifying 1711 * what authentication method to use, then resending all that data 1712 * - waiting for potential 401 replies directly after sending the 1713 * POST header (waiting for some unspecified time) 1714 * Therefore, we copy the full auth state, which works for both basic 1715 * and digest. (For digest, we would have to synchronize the nonce 1716 * count variable between the two sessions, if we'd do more requests 1717 * with the original session, though.) 1718 */ 1719 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd); 1720 1721 /* complete the connection */ 1722 if (ffurl_connect(rt->rtsp_hd_out, NULL)) { 1723 err = AVERROR(EIO); 1724 goto fail; 1725 } 1726 } else { 1727 /* open the tcp connection */ 1728 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, 1729 "?timeout=%d", rt->stimeout); 1730 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE, 1731 &s->interrupt_callback, NULL) < 0) { 1732 err = AVERROR(EIO); 1733 goto fail; 1734 } 1735 rt->rtsp_hd_out = rt->rtsp_hd; 1736 } 1737 rt->seq = 0; 1738 1739 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd); 1740 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) { 1741 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host), 1742 NULL, 0, NI_NUMERICHOST); 1743 } 1744 1745 /* request options supported by the server; this also detects server 1746 * type */ 1747 for (rt->server_type = RTSP_SERVER_RTP;;) { 1748 cmd[0] = 0; 1749 if (rt->server_type == RTSP_SERVER_REAL) 1750 av_strlcat(cmd, 1751 /* 1752 * The following entries are required for proper 1753 * streaming from a Realmedia server. They are 1754 * interdependent in some way although we currently 1755 * don't quite understand how. Values were copied 1756 * from mplayer SVN r23589. 1757 * ClientChallenge is a 16-byte ID in hex 1758 * CompanyID is a 16-byte ID in base64 1759 */ 1760 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n" 1761 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n" 1762 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n" 1763 "GUID: 00000000-0000-0000-0000-000000000000\r\n", 1764 sizeof(cmd)); 1765 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL); 1766 if (reply->status_code != RTSP_STATUS_OK) { 1767 err = AVERROR_INVALIDDATA; 1768 goto fail; 1769 } 1770 1771 /* detect server type if not standard-compliant RTP */ 1772 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) { 1773 rt->server_type = RTSP_SERVER_REAL; 1774 continue; 1775 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) { 1776 rt->server_type = RTSP_SERVER_WMS; 1777 } else if (rt->server_type == RTSP_SERVER_REAL) 1778 strcpy(real_challenge, reply->real_challenge); 1779 break; 1780 } 1781 1782 if (s->iformat && CONFIG_RTSP_DEMUXER) 1783 err = ff_rtsp_setup_input_streams(s, reply); 1784 else if (CONFIG_RTSP_MUXER) 1785 err = ff_rtsp_setup_output_streams(s, host); 1786 if (err) 1787 goto fail; 1788 1789 do { 1790 int lower_transport = ff_log2_tab[lower_transport_mask & 1791 ~(lower_transport_mask - 1)]; 1792 1793 if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) 1794 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP)) 1795 lower_transport = RTSP_LOWER_TRANSPORT_TCP; 1796 1797 err = ff_rtsp_make_setup_request(s, host, port, lower_transport, 1798 rt->server_type == RTSP_SERVER_REAL ? 1799 real_challenge : NULL); 1800 if (err < 0) 1801 goto fail; 1802 lower_transport_mask &= ~(1 << lower_transport); 1803 if (lower_transport_mask == 0 && err == 1) { 1804 err = AVERROR(EPROTONOSUPPORT); 1805 goto fail; 1806 } 1807 } while (err); 1808 1809 rt->lower_transport_mask = lower_transport_mask; 1810 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge)); 1811 rt->state = RTSP_STATE_IDLE; 1812 rt->seek_timestamp = 0; /* default is to start stream at position zero */ 1813 return 0; 1814 fail: 1815 ff_rtsp_close_streams(s); 1816 ff_rtsp_close_connections(s); 1817 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) { 1818 av_strlcpy(s->filename, reply->location, sizeof(s->filename)); 1819 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n", 1820 reply->status_code, 1821 s->filename); 1822 goto redirect; 1823 } 1824 ff_network_close(); 1825 return err; 1826} 1827#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */ 1828 1829#if CONFIG_RTPDEC 1830static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, 1831 uint8_t *buf, int buf_size, int64_t wait_end) 1832{ 1833 RTSPState *rt = s->priv_data; 1834 RTSPStream *rtsp_st; 1835 int n, i, ret, tcp_fd, timeout_cnt = 0; 1836 int max_p = 0; 1837 struct pollfd *p = rt->p; 1838 int *fds = NULL, fdsnum, fdsidx; 1839 1840 for (;;) { 1841 if (ff_check_interrupt(&s->interrupt_callback)) 1842 return AVERROR_EXIT; 1843 if (wait_end && wait_end - av_gettime() < 0) 1844 return AVERROR(EAGAIN); 1845 max_p = 0; 1846 if (rt->rtsp_hd) { 1847 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd); 1848 p[max_p].fd = tcp_fd; 1849 p[max_p++].events = POLLIN; 1850 } else { 1851 tcp_fd = -1; 1852 } 1853 for (i = 0; i < rt->nb_rtsp_streams; i++) { 1854 rtsp_st = rt->rtsp_streams[i]; 1855 if (rtsp_st->rtp_handle) { 1856 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle, 1857 &fds, &fdsnum)) { 1858 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n"); 1859 return ret; 1860 } 1861 if (fdsnum != 2) { 1862 av_log(s, AV_LOG_ERROR, 1863 "Number of fds %d not supported\n", fdsnum); 1864 return AVERROR_INVALIDDATA; 1865 } 1866 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) { 1867 p[max_p].fd = fds[fdsidx]; 1868 p[max_p++].events = POLLIN; 1869 } 1870 av_free(fds); 1871 } 1872 } 1873 n = poll(p, max_p, POLL_TIMEOUT_MS); 1874 if (n > 0) { 1875 int j = 1 - (tcp_fd == -1); 1876 timeout_cnt = 0; 1877 for (i = 0; i < rt->nb_rtsp_streams; i++) { 1878 rtsp_st = rt->rtsp_streams[i]; 1879 if (rtsp_st->rtp_handle) { 1880 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) { 1881 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size); 1882 if (ret > 0) { 1883 *prtsp_st = rtsp_st; 1884 return ret; 1885 } 1886 } 1887 j+=2; 1888 } 1889 } 1890#if CONFIG_RTSP_DEMUXER 1891 if (tcp_fd != -1 && p[0].revents & POLLIN) { 1892 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) { 1893 if (rt->state == RTSP_STATE_STREAMING) { 1894 if (!ff_rtsp_parse_streaming_commands(s)) 1895 return AVERROR_EOF; 1896 else 1897 av_log(s, AV_LOG_WARNING, 1898 "Unable to answer to TEARDOWN\n"); 1899 } else 1900 return 0; 1901 } else { 1902 RTSPMessageHeader reply; 1903 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL); 1904 if (ret < 0) 1905 return ret; 1906 /* XXX: parse message */ 1907 if (rt->state != RTSP_STATE_STREAMING) 1908 return 0; 1909 } 1910 } 1911#endif 1912 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) { 1913 return AVERROR(ETIMEDOUT); 1914 } else if (n < 0 && errno != EINTR) 1915 return AVERROR(errno); 1916 } 1917} 1918 1919static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st, 1920 const uint8_t *buf, int len) 1921{ 1922 RTSPState *rt = s->priv_data; 1923 int i; 1924 if (len < 0) 1925 return len; 1926 if (rt->nb_rtsp_streams == 1) { 1927 *rtsp_st = rt->rtsp_streams[0]; 1928 return len; 1929 } 1930 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) { 1931 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) { 1932 int no_ssrc = 0; 1933 for (i = 0; i < rt->nb_rtsp_streams; i++) { 1934 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv; 1935 if (!rtpctx) 1936 continue; 1937 if (rtpctx->ssrc == AV_RB32(&buf[4])) { 1938 *rtsp_st = rt->rtsp_streams[i]; 1939 return len; 1940 } 1941 if (!rtpctx->ssrc) 1942 no_ssrc = 1; 1943 } 1944 if (no_ssrc) { 1945 av_log(s, AV_LOG_WARNING, 1946 "Unable to pick stream for packet - SSRC not known for " 1947 "all streams\n"); 1948 return AVERROR(EAGAIN); 1949 } 1950 } else { 1951 for (i = 0; i < rt->nb_rtsp_streams; i++) { 1952 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) { 1953 *rtsp_st = rt->rtsp_streams[i]; 1954 return len; 1955 } 1956 } 1957 } 1958 } 1959 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n"); 1960 return AVERROR(EAGAIN); 1961} 1962 1963int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt) 1964{ 1965 RTSPState *rt = s->priv_data; 1966 int ret, len; 1967 RTSPStream *rtsp_st, *first_queue_st = NULL; 1968 int64_t wait_end = 0; 1969 1970 if (rt->nb_byes == rt->nb_rtsp_streams) 1971 return AVERROR_EOF; 1972 1973 /* get next frames from the same RTP packet */ 1974 if (rt->cur_transport_priv) { 1975 if (rt->transport == RTSP_TRANSPORT_RDT) { 1976 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0); 1977 } else if (rt->transport == RTSP_TRANSPORT_RTP) { 1978 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0); 1979 } else if (rt->ts && CONFIG_RTPDEC) { 1980 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos); 1981 if (ret >= 0) { 1982 rt->recvbuf_pos += ret; 1983 ret = rt->recvbuf_pos < rt->recvbuf_len; 1984 } 1985 } else 1986 ret = -1; 1987 if (ret == 0) { 1988 rt->cur_transport_priv = NULL; 1989 return 0; 1990 } else if (ret == 1) { 1991 return 0; 1992 } else 1993 rt->cur_transport_priv = NULL; 1994 } 1995 1996redo: 1997 if (rt->transport == RTSP_TRANSPORT_RTP) { 1998 int i; 1999 int64_t first_queue_time = 0; 2000 for (i = 0; i < rt->nb_rtsp_streams; i++) { 2001 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv; 2002 int64_t queue_time; 2003 if (!rtpctx) 2004 continue; 2005 queue_time = ff_rtp_queued_packet_time(rtpctx); 2006 if (queue_time && (queue_time - first_queue_time < 0 || 2007 !first_queue_time)) { 2008 first_queue_time = queue_time; 2009 first_queue_st = rt->rtsp_streams[i]; 2010 } 2011 } 2012 if (first_queue_time) { 2013 wait_end = first_queue_time + s->max_delay; 2014 } else { 2015 wait_end = 0; 2016 first_queue_st = NULL; 2017 } 2018 } 2019 2020 /* read next RTP packet */ 2021 if (!rt->recvbuf) { 2022 rt->recvbuf = av_malloc(RECVBUF_SIZE); 2023 if (!rt->recvbuf) 2024 return AVERROR(ENOMEM); 2025 } 2026 2027 switch(rt->lower_transport) { 2028 default: 2029#if CONFIG_RTSP_DEMUXER 2030 case RTSP_LOWER_TRANSPORT_TCP: 2031 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE); 2032 break; 2033#endif 2034 case RTSP_LOWER_TRANSPORT_UDP: 2035 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: 2036 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end); 2037 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP) 2038 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, rtsp_st->rtp_handle, NULL, len); 2039 break; 2040 case RTSP_LOWER_TRANSPORT_CUSTOM: 2041 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP && 2042 wait_end && wait_end < av_gettime()) 2043 len = AVERROR(EAGAIN); 2044 else 2045 len = ffio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE); 2046 len = pick_stream(s, &rtsp_st, rt->recvbuf, len); 2047 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP) 2048 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, NULL, s->pb, len); 2049 break; 2050 } 2051 if (len == AVERROR(EAGAIN) && first_queue_st && 2052 rt->transport == RTSP_TRANSPORT_RTP) { 2053 rtsp_st = first_queue_st; 2054 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0); 2055 goto end; 2056 } 2057 if (len < 0) 2058 return len; 2059 if (len == 0) 2060 return AVERROR_EOF; 2061 if (rt->transport == RTSP_TRANSPORT_RDT) { 2062 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len); 2063 } else if (rt->transport == RTSP_TRANSPORT_RTP) { 2064 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len); 2065 if (rtsp_st->feedback) { 2066 AVIOContext *pb = NULL; 2067 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM) 2068 pb = s->pb; 2069 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb); 2070 } 2071 if (ret < 0) { 2072 /* Either bad packet, or a RTCP packet. Check if the 2073 * first_rtcp_ntp_time field was initialized. */ 2074 RTPDemuxContext *rtpctx = rtsp_st->transport_priv; 2075 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) { 2076 /* first_rtcp_ntp_time has been initialized for this stream, 2077 * copy the same value to all other uninitialized streams, 2078 * in order to map their timestamp origin to the same ntp time 2079 * as this one. */ 2080 int i; 2081 AVStream *st = NULL; 2082 if (rtsp_st->stream_index >= 0) 2083 st = s->streams[rtsp_st->stream_index]; 2084 for (i = 0; i < rt->nb_rtsp_streams; i++) { 2085 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv; 2086 AVStream *st2 = NULL; 2087 if (rt->rtsp_streams[i]->stream_index >= 0) 2088 st2 = s->streams[rt->rtsp_streams[i]->stream_index]; 2089 if (rtpctx2 && st && st2 && 2090 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) { 2091 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time; 2092 rtpctx2->rtcp_ts_offset = av_rescale_q( 2093 rtpctx->rtcp_ts_offset, st->time_base, 2094 st2->time_base); 2095 } 2096 } 2097 // Make real NTP start time available in AVFormatContext 2098 if (s->start_time_realtime == AV_NOPTS_VALUE) { 2099 s->start_time_realtime = av_rescale (rtpctx->first_rtcp_ntp_time - (NTP_OFFSET << 32), 1000000, 1LL << 32); 2100 if (rtpctx->st) { 2101 s->start_time_realtime -= 2102 av_rescale (rtpctx->rtcp_ts_offset, 2103 (uint64_t) rtpctx->st->time_base.num * 1000000, 2104 rtpctx->st->time_base.den); 2105 } 2106 } 2107 } 2108 if (ret == -RTCP_BYE) { 2109 rt->nb_byes++; 2110 2111 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n", 2112 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams); 2113 2114 if (rt->nb_byes == rt->nb_rtsp_streams) 2115 return AVERROR_EOF; 2116 } 2117 } 2118 } else if (rt->ts && CONFIG_RTPDEC) { 2119 ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len); 2120 if (ret >= 0) { 2121 if (ret < len) { 2122 rt->recvbuf_len = len; 2123 rt->recvbuf_pos = ret; 2124 rt->cur_transport_priv = rt->ts; 2125 return 1; 2126 } else { 2127 ret = 0; 2128 } 2129 } 2130 } else { 2131 return AVERROR_INVALIDDATA; 2132 } 2133end: 2134 if (ret < 0) 2135 goto redo; 2136 if (ret == 1) 2137 /* more packets may follow, so we save the RTP context */ 2138 rt->cur_transport_priv = rtsp_st->transport_priv; 2139 2140 return ret; 2141} 2142#endif /* CONFIG_RTPDEC */ 2143 2144#if CONFIG_SDP_DEMUXER 2145static int sdp_probe(AVProbeData *p1) 2146{ 2147 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size; 2148 2149 /* we look for a line beginning "c=IN IP" */ 2150 while (p < p_end && *p != '\0') { 2151 if (p + sizeof("c=IN IP") - 1 < p_end && 2152 av_strstart(p, "c=IN IP", NULL)) 2153 return AVPROBE_SCORE_EXTENSION; 2154 2155 while (p < p_end - 1 && *p != '\n') p++; 2156 if (++p >= p_end) 2157 break; 2158 if (*p == '\r') 2159 p++; 2160 } 2161 return 0; 2162} 2163 2164static void append_source_addrs(char *buf, int size, const char *name, 2165 int count, struct RTSPSource **addrs) 2166{ 2167 int i; 2168 if (!count) 2169 return; 2170 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr); 2171 for (i = 1; i < count; i++) 2172 av_strlcatf(buf, size, ",%s", addrs[i]->addr); 2173} 2174 2175static int sdp_read_header(AVFormatContext *s) 2176{ 2177 RTSPState *rt = s->priv_data; 2178 RTSPStream *rtsp_st; 2179 int size, i, err; 2180 char *content; 2181 char url[1024]; 2182 2183 if (!ff_network_init()) 2184 return AVERROR(EIO); 2185 2186 if (s->max_delay < 0) /* Not set by the caller */ 2187 s->max_delay = DEFAULT_REORDERING_DELAY; 2188 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO) 2189 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM; 2190 2191 /* read the whole sdp file */ 2192 /* XXX: better loading */ 2193 content = av_malloc(SDP_MAX_SIZE); 2194 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1); 2195 if (size <= 0) { 2196 av_free(content); 2197 return AVERROR_INVALIDDATA; 2198 } 2199 content[size] ='\0'; 2200 2201 err = ff_sdp_parse(s, content); 2202 av_free(content); 2203 if (err) goto fail; 2204 2205 /* open each RTP stream */ 2206 for (i = 0; i < rt->nb_rtsp_streams; i++) { 2207 char namebuf[50]; 2208 rtsp_st = rt->rtsp_streams[i]; 2209 2210 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) { 2211 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip), 2212 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST); 2213 ff_url_join(url, sizeof(url), "rtp", NULL, 2214 namebuf, rtsp_st->sdp_port, 2215 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d", 2216 rtsp_st->sdp_port, rtsp_st->sdp_ttl, 2217 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0, 2218 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0); 2219 2220 append_source_addrs(url, sizeof(url), "sources", 2221 rtsp_st->nb_include_source_addrs, 2222 rtsp_st->include_source_addrs); 2223 append_source_addrs(url, sizeof(url), "block", 2224 rtsp_st->nb_exclude_source_addrs, 2225 rtsp_st->exclude_source_addrs); 2226 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE, 2227 &s->interrupt_callback, NULL) < 0) { 2228 err = AVERROR_INVALIDDATA; 2229 goto fail; 2230 } 2231 } 2232 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st))) 2233 goto fail; 2234 } 2235 return 0; 2236fail: 2237 ff_rtsp_close_streams(s); 2238 ff_network_close(); 2239 return err; 2240} 2241 2242static int sdp_read_close(AVFormatContext *s) 2243{ 2244 ff_rtsp_close_streams(s); 2245 ff_network_close(); 2246 return 0; 2247} 2248 2249static const AVClass sdp_demuxer_class = { 2250 .class_name = "SDP demuxer", 2251 .item_name = av_default_item_name, 2252 .option = sdp_options, 2253 .version = LIBAVUTIL_VERSION_INT, 2254}; 2255 2256AVInputFormat ff_sdp_demuxer = { 2257 .name = "sdp", 2258 .long_name = NULL_IF_CONFIG_SMALL("SDP"), 2259 .priv_data_size = sizeof(RTSPState), 2260 .read_probe = sdp_probe, 2261 .read_header = sdp_read_header, 2262 .read_packet = ff_rtsp_fetch_packet, 2263 .read_close = sdp_read_close, 2264 .priv_class = &sdp_demuxer_class, 2265}; 2266#endif /* CONFIG_SDP_DEMUXER */ 2267 2268#if CONFIG_RTP_DEMUXER 2269static int rtp_probe(AVProbeData *p) 2270{ 2271 if (av_strstart(p->filename, "rtp:", NULL)) 2272 return AVPROBE_SCORE_MAX; 2273 return 0; 2274} 2275 2276static int rtp_read_header(AVFormatContext *s) 2277{ 2278 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH]; 2279 char host[500], sdp[500]; 2280 int ret, port; 2281 URLContext* in = NULL; 2282 int payload_type; 2283 AVCodecContext codec = { 0 }; 2284 struct sockaddr_storage addr; 2285 AVIOContext pb; 2286 socklen_t addrlen = sizeof(addr); 2287 RTSPState *rt = s->priv_data; 2288 2289 if (!ff_network_init()) 2290 return AVERROR(EIO); 2291 2292 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ, 2293 &s->interrupt_callback, NULL); 2294 if (ret) 2295 goto fail; 2296 2297 while (1) { 2298 ret = ffurl_read(in, recvbuf, sizeof(recvbuf)); 2299 if (ret == AVERROR(EAGAIN)) 2300 continue; 2301 if (ret < 0) 2302 goto fail; 2303 if (ret < 12) { 2304 av_log(s, AV_LOG_WARNING, "Received too short packet\n"); 2305 continue; 2306 } 2307 2308 if ((recvbuf[0] & 0xc0) != 0x80) { 2309 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet " 2310 "received\n"); 2311 continue; 2312 } 2313 2314 if (RTP_PT_IS_RTCP(recvbuf[1])) 2315 continue; 2316 2317 payload_type = recvbuf[1] & 0x7f; 2318 break; 2319 } 2320 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen); 2321 ffurl_close(in); 2322 in = NULL; 2323 2324 if (ff_rtp_get_codec_info(&codec, payload_type)) { 2325 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d " 2326 "without an SDP file describing it\n", 2327 payload_type); 2328 goto fail; 2329 } 2330 if (codec.codec_type != AVMEDIA_TYPE_DATA) { 2331 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received " 2332 "properly you need an SDP file " 2333 "describing it\n"); 2334 } 2335 2336 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, 2337 NULL, 0, s->filename); 2338 2339 snprintf(sdp, sizeof(sdp), 2340 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n", 2341 addr.ss_family == AF_INET ? 4 : 6, host, 2342 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" : 2343 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio", 2344 port, payload_type); 2345 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp); 2346 2347 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL); 2348 s->pb = &pb; 2349 2350 /* sdp_read_header initializes this again */ 2351 ff_network_close(); 2352 2353 rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1; 2354 2355 ret = sdp_read_header(s); 2356 s->pb = NULL; 2357 return ret; 2358 2359fail: 2360 if (in) 2361 ffurl_close(in); 2362 ff_network_close(); 2363 return ret; 2364} 2365 2366static const AVClass rtp_demuxer_class = { 2367 .class_name = "RTP demuxer", 2368 .item_name = av_default_item_name, 2369 .option = rtp_options, 2370 .version = LIBAVUTIL_VERSION_INT, 2371}; 2372 2373AVInputFormat ff_rtp_demuxer = { 2374 .name = "rtp", 2375 .long_name = NULL_IF_CONFIG_SMALL("RTP input"), 2376 .priv_data_size = sizeof(RTSPState), 2377 .read_probe = rtp_probe, 2378 .read_header = rtp_read_header, 2379 .read_packet = ff_rtsp_fetch_packet, 2380 .read_close = sdp_read_close, 2381 .flags = AVFMT_NOFILE, 2382 .priv_class = &rtp_demuxer_class, 2383}; 2384#endif /* CONFIG_RTP_DEMUXER */ 2385